??????Android??view?????????????????????????????????????????????????????￡????????????

????View????????????????д???

?????????onMeasure???????????и?????????????ж?????????????????????и???????????????????????????????????????????????????????????????С??

????????????й?????????

????onMeasure(int widthMeasureSpec?? int heightMeasureSpec)??????widthMeasureSpec??heightMeasureSpec?????и???????????????????????????setMeasuredDimension(width?? height)???????????С???????view??

??????onMeasure??????????view??????С(?????????view??measure?????????view???С)

?????????onLayout???????????????????????????????????????????????????????????????????????????????????????????????λ??????????????????С??

????????????й???????????

????onLayout(boolean changed?? int left?? int top?? int right?? int bottom)-???view??????е????λ??????????view??λ?ü????????????view??layout????????е?λ?????????view??

?????????dispatchDraw?????????????????????????????????????????????????????????????????????

??????dispatchDraw???????????????????????????????????????????drawChild????????view??????